Disposal runs but water backs up into sink; F05 drain restriction warning shown on Miele control or app.

Safety first: Turn off the disposal and disconnect power at the breaker. Do not work on plumbing with the unit energized.

• Check sink stopper and baffle: Remove the sink baffle or stopper and ensure it is not blocking the outlet opening.
• Inspect discharge outlet: Detach the discharge pipe from the side of the disposal. Use a small brush or plastic tool to clear any food buildup at the outlet.
• Clean P-trap: Place a bucket under the trap, loosen the slip nuts, and remove the trap. Clear any sludge or debris and reassemble, ensuring gaskets are seated correctly.
• Dishwasher knockout: If recently installed with a Miele dishwasher, confirm the dishwasher knockout plug in the disposal inlet has been removed.
• Flush system: Restore power, run cold water at full flow, and operate the disposal briefly to confirm proper drainage.